Lol. Feels like no one except Heimer players care about Heimerdinger..
I saw him way too much in the new season, like in 90% of my games. But the last time i saw a Heimy that wasn't me it was in aram, mid season two... I think he and Karma are the champions that needs it the most, then i would say Urgot.
Just a tip about last "buff" on heimer : the new turret aim made the ganks easier to counter, but it's really harder to farm before level 9.. Really, it's a problem because he "have to" push his lane, passive and turrets oblige that and we know it's not the best way to lane early, so if he can't farm well, the enemy just sit beside the turret and overfarm. (actually they equal-farm me, but it means i have to overextend, which is so risky in the new bruiser/assassin mid meta with a jax, xin, vi, kha, noc or maokai jungle)